Q&A:Q: Why the charging speed is slow?A: The charging speed is greatly influenced by the ambient temperature. If the temperature is low, the charging speed becomes faster. Samsung devices will enter protection mode at 40℃~45℃. We do not recommend using this charger at high temperatures.Q: Why can’t I charge my iPhone or Samsung at full speed?A: Please check the USB charger. The product should be used with the QC2.0/QC3.0 fast charger and make sure your cellphone is in the center of the wireless charger.Q: Why does the red light flash?A: The flashing of red light means the abnormal charging. You can clean up foreign matter or lower the temperature or plug again.